A semiconductor is an electronic component that utilizes conduction in the solid state and are most commonly manufactured as single discrete devices (such as diodes & transistors) or as integrated circuits (ICs) which may incorporate multiple devices within a single semiconductor substrate. Semiconductor materials vary greatly and include silicon, germanium, gallium arsenide and more, including organic semiconductor materials. Semiconductor materials can be physically manipulated to alter behavior of conductivity or by introducing electric & magnetic fields, heat, or light to achieve the desired result.